What are the top high-yield government bonds and treasury securities available in Chad through the CEMAC regional financial market and BEAC treasury auctions? Which Treasury bills (BTA) and Treasury bonds (OTA) issued by Chad currently offer the highest interest rates and fixed-income returns for investors seeking yield opportunities in Central Africa? How do Chadian sovereign bonds compare with other CEMAC countries in terms of bond yields, credit risk, maturity periods, and investor demand? Which debt instruments are considered the highest-yielding investment options based on recent regional bond market activity, treasury issuances, and emerging market fixed-income performance?